Very cool game you've made! The attack feels great and I am very surprised with how much you were able to create in a week :). I can see you took a lot of inspiration for hollow knight, notably with the designs, combat, and movement. I think the biggest qualms with me are the visuals and lack of options from the player. Having only one attack (while it can be used for movement and attack, which is cool) felt very limiting. Additionally, the use of the limitation felt very hammered in, kind of just a "fuck it, sure" type thing. You had a really cool player hud with health and money, and then the main gimmick of the jam is just a pixel font on the bottom right corner that cut off out of the screen sometimes. The types of rules that were in the game were also pretty bare bones, speed up the game, low gravity, double money, etc. were all just number tweaks and didn't really offer much new gameplay so much so that it feels more of a hamper to the gameplay than additive. Very amazing job with how much you got done, and I can see this project being really interesting!